Dehumidifier Vs. Air Purifier

Both dehumidifiers and air purifiers function in different manners. When choosing which to use in the home, determine your ultimate goal—to control and remove mold, pollen, pet dander or other items from the air and surfaces. When used in combination, a home can benefit from their combined and varied function.


There are two types of dehumidifiers on the marketplace: warm mist and cool mist. Both have slight advantages and disadvantages. Regardless of the type of mist, both affect the level of moisture in the air and lower the humidity level.

Air Purifiers

Air cleaners or air purifiers pull air into a filter that removes large particles from the air. They are most commonly used to remove pollutants, including smoke, mold spores, pollen and pet dander.

Mold Control

According to the Center for Disease Control, mold thrives in moist, humid environments. Dehumidifiers can control and prevent mold growth by lowering the humidity levels in the air. Purifiers combat mold by removing spores from the air.

Dust Mites

One of the items in household dust is dust mites. While in the air, particles can be easily filtered and removed. These household pests also need moisture to survive. According to the American College of Allergy, Asthma and Immunology, dehumidifiers can lower the humidity levels below 50 percent, which will cause dust mites to dry out and die.

Pet Dander

While both types of units are highly effective in controlling mold and dust mites, only air purifiers can remove pet dander from the air. However, air purifiers can only remove airborne particles. Once pet dander settles on furniture, bedding, clothing and other items, it must be removed manually through vacuuming and cleaning.